Fourth moon discovered around Pluto

作者：阎卷 发布时间：2019-03-01 08:08:09

OH, the irony. Five years after Pluto was stripped of its planet status, astronomers have found yet another moon in orbit around it, bringing its entourage to four. The Hubble Space Telescope spotted the new moon, which is between 13 and 34 kilometres across. It orbits between two slightly larger satellites, Nix and Hydra, out beyond the largest, Charon. All four probably formed at the same time in a collision in the early solar system. The moon has been dubbed P4 for the time being,